./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:45:31,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:45:31,160 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:45:31,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:45:31,165 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:45:31,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:45:31,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:45:31,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:45:31,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:45:31,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:45:31,190 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:45:31,190 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:45:31,191 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:45:31,191 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:45:31,192 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:45:31,192 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:45:31,193 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:45:31,193 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:45:31,194 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:45:31,194 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:45:31,195 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:45:31,195 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:45:31,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:45:31,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:45:31,197 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:45:31,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:45:31,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:45:31,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:45:31,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:45:31,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:45:31,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:45:31,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:45:31,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:45:31,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:45:31,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:45:31,201 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:45:31,201 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:45:31,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:45:31,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:45:31,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:45:31,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:45:31,202 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:45:31,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:45:31,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:45:31,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:45:31,203 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:45:31,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:45:31,203 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d [2023-12-02 16:45:31,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:45:31,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:45:31,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:45:31,461 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:45:31,462 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:45:31,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-12-02 16:45:34,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:45:34,394 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:45:34,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-12-02 16:45:34,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/data/2ef971b8e/16dcf26dbe014e5098de398ef68e4e45/FLAG997ff79a2 [2023-12-02 16:45:34,420 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/data/2ef971b8e/16dcf26dbe014e5098de398ef68e4e45 [2023-12-02 16:45:34,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:45:34,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:45:34,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:45:34,425 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:45:34,429 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:45:34,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784c0065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34, skipping insertion in model container [2023-12-02 16:45:34,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,471 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:45:34,590 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2023-12-02 16:45:34,648 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2023-12-02 16:45:34,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:45:34,691 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:45:34,703 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2023-12-02 16:45:34,720 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2023-12-02 16:45:34,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:45:34,752 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:45:34,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34 WrapperNode [2023-12-02 16:45:34,753 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:45:34,754 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:45:34,754 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:45:34,754 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:45:34,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,795 INFO L138 Inliner]: procedures = 55, calls = 61, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 416 [2023-12-02 16:45:34,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:45:34,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:45:34,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:45:34,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:45:34,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:45:34,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:45:34,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:45:34,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:45:34,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (1/1) ... [2023-12-02 16:45:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:45:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:34,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:45:34,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:45:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:45:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 16:45:34,907 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 16:45:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 16:45:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 16:45:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 16:45:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 16:45:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 16:45:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 16:45:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 16:45:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 16:45:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 16:45:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 16:45:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 16:45:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 16:45:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 16:45:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 16:45:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 16:45:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 16:45:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 16:45:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 16:45:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 16:45:34,911 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 16:45:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:45:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 16:45:34,911 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 16:45:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 16:45:34,911 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 16:45:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:45:34,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:45:34,912 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 16:45:34,912 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 16:45:34,912 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-02 16:45:34,912 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-02 16:45:35,007 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:45:35,011 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:45:35,416 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:45:35,548 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:45:35,549 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-02 16:45:35,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:45:35 BoogieIcfgContainer [2023-12-02 16:45:35,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:45:35,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:45:35,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:45:35,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:45:35,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:45:34" (1/3) ... [2023-12-02 16:45:35,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147158d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:45:35, skipping insertion in model container [2023-12-02 16:45:35,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:34" (2/3) ... [2023-12-02 16:45:35,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147158d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:45:35, skipping insertion in model container [2023-12-02 16:45:35,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:45:35" (3/3) ... [2023-12-02 16:45:35,557 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-12-02 16:45:35,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:45:35,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 16:45:35,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:45:35,624 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@219f45c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:45:35,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 16:45:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 106 states have internal predecessors, (145), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 16:45:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 16:45:35,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:35,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:35,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:35,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1150524214, now seen corresponding path program 1 times [2023-12-02 16:45:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:35,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162620588] [2023-12-02 16:45:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:35,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:35,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162620588] [2023-12-02 16:45:35,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162620588] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:35,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:35,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:45:35,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220421031] [2023-12-02 16:45:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:45:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:45:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:45:35,986 INFO L87 Difference]: Start difference. First operand has 147 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 106 states have internal predecessors, (145), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:45:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:36,571 INFO L93 Difference]: Finished difference Result 519 states and 750 transitions. [2023-12-02 16:45:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:45:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-12-02 16:45:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:36,589 INFO L225 Difference]: With dead ends: 519 [2023-12-02 16:45:36,590 INFO L226 Difference]: Without dead ends: 367 [2023-12-02 16:45:36,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:45:36,597 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 450 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:36,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 479 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:45:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-12-02 16:45:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 354. [2023-12-02 16:45:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 243 states have (on average 1.3292181069958848) internal successors, (323), 251 states have internal predecessors, (323), 72 states have call successors, (72), 39 states have call predecessors, (72), 37 states have return successors, (86), 65 states have call predecessors, (86), 68 states have call successors, (86) [2023-12-02 16:45:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 481 transitions. [2023-12-02 16:45:36,686 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 481 transitions. Word has length 35 [2023-12-02 16:45:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:36,687 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 481 transitions. [2023-12-02 16:45:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:45:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 481 transitions. [2023-12-02 16:45:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:45:36,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:36,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:45:36,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:36,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2145077065, now seen corresponding path program 1 times [2023-12-02 16:45:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:36,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157510103] [2023-12-02 16:45:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:36,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:36,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157510103] [2023-12-02 16:45:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157510103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:36,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:45:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476090726] [2023-12-02 16:45:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:36,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:45:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:36,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:45:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:45:36,825 INFO L87 Difference]: Start difference. First operand 354 states and 481 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:45:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:37,540 INFO L93 Difference]: Finished difference Result 829 states and 1111 transitions. [2023-12-02 16:45:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:45:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 16:45:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:37,550 INFO L225 Difference]: With dead ends: 829 [2023-12-02 16:45:37,550 INFO L226 Difference]: Without dead ends: 765 [2023-12-02 16:45:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:45:37,554 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 702 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:37,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 699 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:45:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-12-02 16:45:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 694. [2023-12-02 16:45:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 480 states have (on average 1.2958333333333334) internal successors, (622), 488 states have internal predecessors, (622), 127 states have call successors, (127), 87 states have call predecessors, (127), 85 states have return successors, (156), 120 states have call predecessors, (156), 123 states have call successors, (156) [2023-12-02 16:45:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 905 transitions. [2023-12-02 16:45:37,646 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 905 transitions. Word has length 45 [2023-12-02 16:45:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:37,647 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 905 transitions. [2023-12-02 16:45:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:45:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 905 transitions. [2023-12-02 16:45:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:45:37,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:37,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:45:37,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:37,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:37,651 INFO L85 PathProgramCache]: Analyzing trace with hash 340702007, now seen corresponding path program 1 times [2023-12-02 16:45:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:37,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309321697] [2023-12-02 16:45:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:37,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309321697] [2023-12-02 16:45:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309321697] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:37,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:45:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812934065] [2023-12-02 16:45:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:37,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:45:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:45:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:45:37,855 INFO L87 Difference]: Start difference. First operand 694 states and 905 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 16:45:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:38,432 INFO L93 Difference]: Finished difference Result 1455 states and 1852 transitions. [2023-12-02 16:45:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:45:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-12-02 16:45:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:38,441 INFO L225 Difference]: With dead ends: 1455 [2023-12-02 16:45:38,441 INFO L226 Difference]: Without dead ends: 1052 [2023-12-02 16:45:38,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:45:38,445 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 298 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 513 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:45:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-12-02 16:45:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1023. [2023-12-02 16:45:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 703 states have (on average 1.2702702702702702) internal successors, (893), 712 states have internal predecessors, (893), 183 states have call successors, (183), 135 states have call predecessors, (183), 135 states have return successors, (230), 177 states have call predecessors, (230), 179 states have call successors, (230) [2023-12-02 16:45:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1306 transitions. [2023-12-02 16:45:38,561 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1306 transitions. Word has length 46 [2023-12-02 16:45:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1306 transitions. [2023-12-02 16:45:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 16:45:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1306 transitions. [2023-12-02 16:45:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:45:38,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:38,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:45:38,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:38,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1639830124, now seen corresponding path program 1 times [2023-12-02 16:45:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:38,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100350227] [2023-12-02 16:45:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:38,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100350227] [2023-12-02 16:45:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100350227] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:38,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:38,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:45:38,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115246856] [2023-12-02 16:45:38,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:45:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:45:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:45:38,625 INFO L87 Difference]: Start difference. First operand 1023 states and 1306 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:45:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:38,795 INFO L93 Difference]: Finished difference Result 1964 states and 2465 transitions. [2023-12-02 16:45:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:45:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-02 16:45:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:38,805 INFO L225 Difference]: With dead ends: 1964 [2023-12-02 16:45:38,805 INFO L226 Difference]: Without dead ends: 1282 [2023-12-02 16:45:38,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:45:38,809 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 68 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:38,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 304 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:45:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2023-12-02 16:45:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1260. [2023-12-02 16:45:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 864 states have (on average 1.2581018518518519) internal successors, (1087), 873 states have internal predecessors, (1087), 225 states have call successors, (225), 173 states have call predecessors, (225), 169 states have return successors, (276), 215 states have call predecessors, (276), 221 states have call successors, (276) [2023-12-02 16:45:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1588 transitions. [2023-12-02 16:45:38,936 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1588 transitions. Word has length 47 [2023-12-02 16:45:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:38,937 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1588 transitions. [2023-12-02 16:45:38,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:45:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1588 transitions. [2023-12-02 16:45:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 16:45:38,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:38,939 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:38,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:45:38,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:38,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1517982566, now seen corresponding path program 1 times [2023-12-02 16:45:38,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171390694] [2023-12-02 16:45:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:45:38,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171390694] [2023-12-02 16:45:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171390694] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:38,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:45:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484432809] [2023-12-02 16:45:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:38,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:45:38,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:45:38,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:45:38,991 INFO L87 Difference]: Start difference. First operand 1260 states and 1588 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:45:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:39,152 INFO L93 Difference]: Finished difference Result 1666 states and 2078 transitions. [2023-12-02 16:45:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:45:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-12-02 16:45:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:39,161 INFO L225 Difference]: With dead ends: 1666 [2023-12-02 16:45:39,161 INFO L226 Difference]: Without dead ends: 1111 [2023-12-02 16:45:39,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:45:39,164 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 159 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:39,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 229 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:45:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-12-02 16:45:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 905. [2023-12-02 16:45:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 628 states have (on average 1.2484076433121019) internal successors, (784), 636 states have internal predecessors, (784), 162 states have call successors, (162), 119 states have call predecessors, (162), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2023-12-02 16:45:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1130 transitions. [2023-12-02 16:45:39,257 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1130 transitions. Word has length 53 [2023-12-02 16:45:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:39,258 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1130 transitions. [2023-12-02 16:45:39,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:45:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1130 transitions. [2023-12-02 16:45:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 16:45:39,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:39,260 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:45:39,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1961977813, now seen corresponding path program 1 times [2023-12-02 16:45:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480905811] [2023-12-02 16:45:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:39,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:39,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480905811] [2023-12-02 16:45:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480905811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:39,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:45:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561371615] [2023-12-02 16:45:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:45:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:45:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:45:39,344 INFO L87 Difference]: Start difference. First operand 905 states and 1130 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:45:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:39,611 INFO L93 Difference]: Finished difference Result 1160 states and 1431 transitions. [2023-12-02 16:45:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:45:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 16:45:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:39,619 INFO L225 Difference]: With dead ends: 1160 [2023-12-02 16:45:39,619 INFO L226 Difference]: Without dead ends: 1157 [2023-12-02 16:45:39,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:45:39,621 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 297 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:39,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 205 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:45:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-12-02 16:45:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 904. [2023-12-02 16:45:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 628 states have (on average 1.2388535031847134) internal successors, (778), 635 states have internal predecessors, (778), 161 states have call successors, (161), 119 states have call predecessors, (161), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2023-12-02 16:45:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1123 transitions. [2023-12-02 16:45:39,723 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1123 transitions. Word has length 54 [2023-12-02 16:45:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:39,723 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1123 transitions. [2023-12-02 16:45:39,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:45:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1123 transitions. [2023-12-02 16:45:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 16:45:39,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:39,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:39,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:45:39,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:39,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 691113725, now seen corresponding path program 1 times [2023-12-02 16:45:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:39,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601809484] [2023-12-02 16:45:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:39,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:39,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601809484] [2023-12-02 16:45:39,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601809484] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:39,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374319360] [2023-12-02 16:45:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:39,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:45:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:39,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:45:39,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:40,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:45:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:45:40,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374319360] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:45:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219696710] [2023-12-02 16:45:40,305 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 16:45:40,305 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:45:40,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:45:40,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:45:40,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:45:42,533 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-12-02 16:45:42,582 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 97 for LOIs [2023-12-02 16:45:42,623 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-12-02 16:45:43,143 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-12-02 16:45:43,224 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-12-02 16:45:43,329 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-12-02 16:45:43,372 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-12-02 16:45:43,417 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:45:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1219696710] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:49,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:45:49,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 16:45:49,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663472552] [2023-12-02 16:45:49,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:49,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 16:45:49,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 16:45:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 16:45:49,890 INFO L87 Difference]: Start difference. First operand 904 states and 1123 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:46:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:01,484 INFO L93 Difference]: Finished difference Result 1565 states and 1897 transitions. [2023-12-02 16:46:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 16:46:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 16:46:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:01,490 INFO L225 Difference]: With dead ends: 1565 [2023-12-02 16:46:01,490 INFO L226 Difference]: Without dead ends: 952 [2023-12-02 16:46:01,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 16:46:01,493 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 3376 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:01,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2003 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3376 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 16:46:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-12-02 16:46:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 937. [2023-12-02 16:46:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 653 states have (on average 1.231240428790199) internal successors, (804), 660 states have internal predecessors, (804), 163 states have call successors, (163), 125 states have call predecessors, (163), 119 states have return successors, (186), 153 states have call predecessors, (186), 160 states have call successors, (186) [2023-12-02 16:46:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1153 transitions. [2023-12-02 16:46:01,576 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1153 transitions. Word has length 55 [2023-12-02 16:46:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:01,576 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 1153 transitions. [2023-12-02 16:46:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 16:46:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1153 transitions. [2023-12-02 16:46:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 16:46:01,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:01,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:01,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:46:01,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:01,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:01,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1367952006, now seen corresponding path program 1 times [2023-12-02 16:46:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:01,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644036069] [2023-12-02 16:46:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:46:01,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644036069] [2023-12-02 16:46:01,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644036069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:01,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:01,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:46:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373887924] [2023-12-02 16:46:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:01,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:01,848 INFO L87 Difference]: Start difference. First operand 937 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:02,026 INFO L93 Difference]: Finished difference Result 1519 states and 1836 transitions. [2023-12-02 16:46:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 16:46:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:02,034 INFO L225 Difference]: With dead ends: 1519 [2023-12-02 16:46:02,034 INFO L226 Difference]: Without dead ends: 1146 [2023-12-02 16:46:02,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:02,036 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 43 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:02,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 348 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-12-02 16:46:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1058. [2023-12-02 16:46:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 734 states have (on average 1.2220708446866484) internal successors, (897), 745 states have internal predecessors, (897), 185 states have call successors, (185), 147 states have call predecessors, (185), 137 states have return successors, (208), 167 states have call predecessors, (208), 182 states have call successors, (208) [2023-12-02 16:46:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1290 transitions. [2023-12-02 16:46:02,177 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1290 transitions. Word has length 61 [2023-12-02 16:46:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:02,177 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1290 transitions. [2023-12-02 16:46:02,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1290 transitions. [2023-12-02 16:46:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 16:46:02,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:02,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:02,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:46:02,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:02,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 887004113, now seen corresponding path program 1 times [2023-12-02 16:46:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074801021] [2023-12-02 16:46:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:46:02,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074801021] [2023-12-02 16:46:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074801021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:46:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593046456] [2023-12-02 16:46:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:02,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:46:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:46:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:46:02,357 INFO L87 Difference]: Start difference. First operand 1058 states and 1290 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:46:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:02,773 INFO L93 Difference]: Finished difference Result 1493 states and 1879 transitions. [2023-12-02 16:46:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:46:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2023-12-02 16:46:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:02,780 INFO L225 Difference]: With dead ends: 1493 [2023-12-02 16:46:02,781 INFO L226 Difference]: Without dead ends: 1214 [2023-12-02 16:46:02,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:46:02,783 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 372 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:02,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 306 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:46:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2023-12-02 16:46:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1210. [2023-12-02 16:46:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 838 states have (on average 1.224343675417661) internal successors, (1026), 851 states have internal predecessors, (1026), 215 states have call successors, (215), 165 states have call predecessors, (215), 155 states have return successors, (250), 195 states have call predecessors, (250), 212 states have call successors, (250) [2023-12-02 16:46:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1491 transitions. [2023-12-02 16:46:02,947 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1491 transitions. Word has length 61 [2023-12-02 16:46:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:02,947 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1491 transitions. [2023-12-02 16:46:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:46:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1491 transitions. [2023-12-02 16:46:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:46:02,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:02,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:02,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:46:02,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:02,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1835476662, now seen corresponding path program 1 times [2023-12-02 16:46:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:02,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205694349] [2023-12-02 16:46:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:46:03,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:03,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205694349] [2023-12-02 16:46:03,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205694349] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:03,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:03,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:46:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682115818] [2023-12-02 16:46:03,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:03,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:46:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:46:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:46:03,100 INFO L87 Difference]: Start difference. First operand 1210 states and 1491 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:46:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:03,727 INFO L93 Difference]: Finished difference Result 2207 states and 2651 transitions. [2023-12-02 16:46:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:46:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 16:46:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:03,737 INFO L225 Difference]: With dead ends: 2207 [2023-12-02 16:46:03,737 INFO L226 Difference]: Without dead ends: 1521 [2023-12-02 16:46:03,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:46:03,739 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 277 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:03,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 477 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:46:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2023-12-02 16:46:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1390. [2023-12-02 16:46:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 958 states have (on average 1.2056367432150312) internal successors, (1155), 971 states have internal predecessors, (1155), 247 states have call successors, (247), 193 states have call predecessors, (247), 183 states have return successors, (282), 227 states have call predecessors, (282), 244 states have call successors, (282) [2023-12-02 16:46:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1684 transitions. [2023-12-02 16:46:03,948 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1684 transitions. Word has length 63 [2023-12-02 16:46:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:03,948 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1684 transitions. [2023-12-02 16:46:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:46:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1684 transitions. [2023-12-02 16:46:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:46:03,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:03,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:46:03,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:03,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 724435062, now seen corresponding path program 1 times [2023-12-02 16:46:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:03,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110886885] [2023-12-02 16:46:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:46:04,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110886885] [2023-12-02 16:46:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110886885] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:04,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:04,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:46:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664290839] [2023-12-02 16:46:04,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:04,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:04,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:04,004 INFO L87 Difference]: Start difference. First operand 1390 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:04,235 INFO L93 Difference]: Finished difference Result 1861 states and 2329 transitions. [2023-12-02 16:46:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2023-12-02 16:46:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:04,245 INFO L225 Difference]: With dead ends: 1861 [2023-12-02 16:46:04,245 INFO L226 Difference]: Without dead ends: 1483 [2023-12-02 16:46:04,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:04,248 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:04,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 341 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:46:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2023-12-02 16:46:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1427. [2023-12-02 16:46:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 989 states have (on average 1.2093023255813953) internal successors, (1196), 1002 states have internal predecessors, (1196), 250 states have call successors, (250), 196 states have call predecessors, (250), 186 states have return successors, (285), 230 states have call predecessors, (285), 247 states have call successors, (285) [2023-12-02 16:46:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1731 transitions. [2023-12-02 16:46:04,481 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1731 transitions. Word has length 63 [2023-12-02 16:46:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:04,482 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 1731 transitions. [2023-12-02 16:46:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1731 transitions. [2023-12-02 16:46:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 16:46:04,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:04,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:46:04,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:04,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 549833238, now seen corresponding path program 1 times [2023-12-02 16:46:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230151449] [2023-12-02 16:46:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:46:04,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:04,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230151449] [2023-12-02 16:46:04,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230151449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:04,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762544381] [2023-12-02 16:46:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:04,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:04,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:46:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:04,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:46:04,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:46:04,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:46:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:46:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762544381] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:46:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596492479] [2023-12-02 16:46:04,936 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 16:46:04,936 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:46:04,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:46:04,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:46:04,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:46:08,151 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-12-02 16:46:08,177 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 100 for LOIs [2023-12-02 16:46:08,260 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2023-12-02 16:46:08,319 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-12-02 16:46:08,740 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-12-02 16:46:08,816 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-12-02 16:46:08,908 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-12-02 16:46:08,935 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-12-02 16:46:08,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:46:16,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38479#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483647))) (exists ((|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_5| Int) (v_~c_last_read~0_10 Int) (v_~q_free~0_42 Int)) (and (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| 1) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (<= 0 ~p_num_write~0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_5|) (= 1 ~c_dr_i~0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_5| 0)) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= v_~q_free~0_42 1)) (= ~local~0 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_5| 1) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= ~E_M~0 2) (= ~a_t~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0))) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 16:46:16,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:46:16,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:46:16,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 16:46:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563273977] [2023-12-02 16:46:16,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:46:16,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:46:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:46:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:46:16,603 INFO L87 Difference]: Start difference. First operand 1427 states and 1731 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 16:46:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:17,331 INFO L93 Difference]: Finished difference Result 3634 states and 4260 transitions. [2023-12-02 16:46:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:46:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 16:46:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:17,353 INFO L225 Difference]: With dead ends: 3634 [2023-12-02 16:46:17,353 INFO L226 Difference]: Without dead ends: 3631 [2023-12-02 16:46:17,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:46:17,357 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 443 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:17,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 786 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:46:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2023-12-02 16:46:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2742. [2023-12-02 16:46:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 1881 states have (on average 1.189792663476874) internal successors, (2238), 1902 states have internal predecessors, (2238), 477 states have call successors, (477), 400 states have call predecessors, (477), 382 states have return successors, (524), 441 states have call predecessors, (524), 474 states have call successors, (524) [2023-12-02 16:46:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 3239 transitions. [2023-12-02 16:46:17,821 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 3239 transitions. Word has length 64 [2023-12-02 16:46:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:17,822 INFO L495 AbstractCegarLoop]: Abstraction has 2742 states and 3239 transitions. [2023-12-02 16:46:17,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 16:46:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 3239 transitions. [2023-12-02 16:46:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 16:46:17,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:17,824 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:17,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:46:18,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:18,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:18,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1045606334, now seen corresponding path program 2 times [2023-12-02 16:46:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:18,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156306930] [2023-12-02 16:46:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:46:18,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:18,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156306930] [2023-12-02 16:46:18,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156306930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:18,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:18,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:46:18,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961496423] [2023-12-02 16:46:18,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:18,062 INFO L87 Difference]: Start difference. First operand 2742 states and 3239 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:18,355 INFO L93 Difference]: Finished difference Result 3938 states and 4611 transitions. [2023-12-02 16:46:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 16:46:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:18,367 INFO L225 Difference]: With dead ends: 3938 [2023-12-02 16:46:18,368 INFO L226 Difference]: Without dead ends: 2000 [2023-12-02 16:46:18,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:18,373 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 164 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:18,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 271 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2023-12-02 16:46:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1984. [2023-12-02 16:46:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1375 states have (on average 1.1861818181818182) internal successors, (1631), 1388 states have internal predecessors, (1631), 341 states have call successors, (341), 276 states have call predecessors, (341), 266 states have return successors, (380), 321 states have call predecessors, (380), 338 states have call successors, (380) [2023-12-02 16:46:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2352 transitions. [2023-12-02 16:46:18,642 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2352 transitions. Word has length 67 [2023-12-02 16:46:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:18,643 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2352 transitions. [2023-12-02 16:46:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2352 transitions. [2023-12-02 16:46:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 16:46:18,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:18,645 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:46:18,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:18,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash -153666172, now seen corresponding path program 1 times [2023-12-02 16:46:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:18,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995778275] [2023-12-02 16:46:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:46:18,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995778275] [2023-12-02 16:46:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995778275] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:18,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:18,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:46:18,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908981485] [2023-12-02 16:46:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:18,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:18,712 INFO L87 Difference]: Start difference. First operand 1984 states and 2352 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:19,021 INFO L93 Difference]: Finished difference Result 3581 states and 4180 transitions. [2023-12-02 16:46:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 16:46:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:19,033 INFO L225 Difference]: With dead ends: 3581 [2023-12-02 16:46:19,033 INFO L226 Difference]: Without dead ends: 2202 [2023-12-02 16:46:19,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:46:19,037 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 38 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:19,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 341 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2023-12-02 16:46:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2121. [2023-12-02 16:46:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 1472 states have (on average 1.1841032608695652) internal successors, (1743), 1491 states have internal predecessors, (1743), 362 states have call successors, (362), 297 states have call predecessors, (362), 285 states have return successors, (407), 334 states have call predecessors, (407), 359 states have call successors, (407) [2023-12-02 16:46:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2512 transitions. [2023-12-02 16:46:19,376 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2512 transitions. Word has length 71 [2023-12-02 16:46:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:19,376 INFO L495 AbstractCegarLoop]: Abstraction has 2121 states and 2512 transitions. [2023-12-02 16:46:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:46:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2512 transitions. [2023-12-02 16:46:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 16:46:19,379 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:19,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 16:46:19,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:19,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1017643192, now seen corresponding path program 1 times [2023-12-02 16:46:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047820754] [2023-12-02 16:46:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:46:19,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047820754] [2023-12-02 16:46:19,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047820754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426686580] [2023-12-02 16:46:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:19,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:19,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:46:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:19,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:46:19,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:46:19,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426686580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:19,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:19,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:46:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835279622] [2023-12-02 16:46:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:19,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:19,677 INFO L87 Difference]: Start difference. First operand 2121 states and 2512 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:19,948 INFO L93 Difference]: Finished difference Result 2546 states and 3092 transitions. [2023-12-02 16:46:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2023-12-02 16:46:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:19,960 INFO L225 Difference]: With dead ends: 2546 [2023-12-02 16:46:19,960 INFO L226 Difference]: Without dead ends: 2200 [2023-12-02 16:46:19,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:19,962 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 164 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:19,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 175 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:46:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2023-12-02 16:46:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2185. [2023-12-02 16:46:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 1527 states have (on average 1.1846758349705304) internal successors, (1809), 1545 states have internal predecessors, (1809), 362 states have call successors, (362), 305 states have call predecessors, (362), 294 states have return successors, (405), 336 states have call predecessors, (405), 359 states have call successors, (405) [2023-12-02 16:46:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 2576 transitions. [2023-12-02 16:46:20,267 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 2576 transitions. Word has length 91 [2023-12-02 16:46:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:20,268 INFO L495 AbstractCegarLoop]: Abstraction has 2185 states and 2576 transitions. [2023-12-02 16:46:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 2576 transitions. [2023-12-02 16:46:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 16:46:20,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:20,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:20,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:46:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:20,476 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:20,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 904256535, now seen corresponding path program 2 times [2023-12-02 16:46:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602292824] [2023-12-02 16:46:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 16:46:20,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602292824] [2023-12-02 16:46:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602292824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134240777] [2023-12-02 16:46:20,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:46:20,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:20,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:20,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:20,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:46:20,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:46:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:46:20,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:46:20,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:46:20,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134240777] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:20,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:46:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947731026] [2023-12-02 16:46:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:20,774 INFO L87 Difference]: Start difference. First operand 2185 states and 2576 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:21,086 INFO L93 Difference]: Finished difference Result 2695 states and 3283 transitions. [2023-12-02 16:46:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2023-12-02 16:46:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:21,098 INFO L225 Difference]: With dead ends: 2695 [2023-12-02 16:46:21,098 INFO L226 Difference]: Without dead ends: 2302 [2023-12-02 16:46:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:21,101 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 66 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:21,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 344 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2023-12-02 16:46:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 2280. [2023-12-02 16:46:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 1600 states have (on average 1.184375) internal successors, (1895), 1619 states have internal predecessors, (1895), 375 states have call successors, (375), 315 states have call predecessors, (375), 303 states have return successors, (428), 347 states have call predecessors, (428), 372 states have call successors, (428) [2023-12-02 16:46:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 2698 transitions. [2023-12-02 16:46:21,477 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 2698 transitions. Word has length 91 [2023-12-02 16:46:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:21,477 INFO L495 AbstractCegarLoop]: Abstraction has 2280 states and 2698 transitions. [2023-12-02 16:46:21,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 2698 transitions. [2023-12-02 16:46:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 16:46:21,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:21,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:21,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:46:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:46:21,686 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:21,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 469003655, now seen corresponding path program 1 times [2023-12-02 16:46:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120280194] [2023-12-02 16:46:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:21,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:46:21,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:21,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120280194] [2023-12-02 16:46:21,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120280194] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:21,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262397595] [2023-12-02 16:46:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:21,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:21,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:21,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:21,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:46:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:21,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:46:21,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:46:21,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262397595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:21,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:21,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:46:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986849193] [2023-12-02 16:46:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:21,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:21,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:21,973 INFO L87 Difference]: Start difference. First operand 2280 states and 2698 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:22,310 INFO L93 Difference]: Finished difference Result 3134 states and 3805 transitions. [2023-12-02 16:46:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2023-12-02 16:46:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:22,320 INFO L225 Difference]: With dead ends: 3134 [2023-12-02 16:46:22,320 INFO L226 Difference]: Without dead ends: 2507 [2023-12-02 16:46:22,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:46:22,323 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 42 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:22,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2023-12-02 16:46:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2342. [2023-12-02 16:46:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 1648 states have (on average 1.1868932038834952) internal successors, (1956), 1668 states have internal predecessors, (1956), 382 states have call successors, (382), 322 states have call predecessors, (382), 310 states have return successors, (435), 353 states have call predecessors, (435), 379 states have call successors, (435) [2023-12-02 16:46:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 2773 transitions. [2023-12-02 16:46:22,611 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 2773 transitions. Word has length 92 [2023-12-02 16:46:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:22,611 INFO L495 AbstractCegarLoop]: Abstraction has 2342 states and 2773 transitions. [2023-12-02 16:46:22,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:46:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 2773 transitions. [2023-12-02 16:46:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 16:46:22,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:22,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:22,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:46:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:46:22,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:22,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1289541594, now seen corresponding path program 1 times [2023-12-02 16:46:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977424426] [2023-12-02 16:46:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:46:22,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977424426] [2023-12-02 16:46:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977424426] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252539024] [2023-12-02 16:46:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:22,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:22,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:22,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:46:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:22,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:46:22,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:46:23,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252539024] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:23,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 16:46:23,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25456837] [2023-12-02 16:46:23,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:46:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:23,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:46:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:46:23,012 INFO L87 Difference]: Start difference. First operand 2342 states and 2773 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 16:46:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:23,272 INFO L93 Difference]: Finished difference Result 2756 states and 3297 transitions. [2023-12-02 16:46:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:46:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 92 [2023-12-02 16:46:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:23,283 INFO L225 Difference]: With dead ends: 2756 [2023-12-02 16:46:23,283 INFO L226 Difference]: Without dead ends: 2448 [2023-12-02 16:46:23,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:46:23,286 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 44 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:23,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 346 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:46:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2023-12-02 16:46:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2378. [2023-12-02 16:46:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 1676 states have (on average 1.18854415274463) internal successors, (1992), 1696 states have internal predecessors, (1992), 386 states have call successors, (386), 326 states have call predecessors, (386), 314 states have return successors, (439), 357 states have call predecessors, (439), 383 states have call successors, (439) [2023-12-02 16:46:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 2817 transitions. [2023-12-02 16:46:23,532 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 2817 transitions. Word has length 92 [2023-12-02 16:46:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:23,532 INFO L495 AbstractCegarLoop]: Abstraction has 2378 states and 2817 transitions. [2023-12-02 16:46:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 16:46:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 2817 transitions. [2023-12-02 16:46:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 16:46:23,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:23,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:23,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:46:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:46:23,736 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:23,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash -59825936, now seen corresponding path program 1 times [2023-12-02 16:46:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:23,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456254747] [2023-12-02 16:46:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 16:46:23,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456254747] [2023-12-02 16:46:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456254747] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:23,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:23,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:46:23,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964596255] [2023-12-02 16:46:23,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:23,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:46:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:46:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:46:23,833 INFO L87 Difference]: Start difference. First operand 2378 states and 2817 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:46:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:24,249 INFO L93 Difference]: Finished difference Result 3407 states and 4107 transitions. [2023-12-02 16:46:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:46:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2023-12-02 16:46:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:24,259 INFO L225 Difference]: With dead ends: 3407 [2023-12-02 16:46:24,259 INFO L226 Difference]: Without dead ends: 2883 [2023-12-02 16:46:24,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:46:24,262 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 229 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:24,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 351 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2023-12-02 16:46:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2842. [2023-12-02 16:46:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2010 states have (on average 1.1920398009950248) internal successors, (2396), 2027 states have internal predecessors, (2396), 464 states have call successors, (464), 378 states have call predecessors, (464), 366 states have return successors, (515), 438 states have call predecessors, (515), 461 states have call successors, (515) [2023-12-02 16:46:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3375 transitions. [2023-12-02 16:46:24,608 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3375 transitions. Word has length 94 [2023-12-02 16:46:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:24,608 INFO L495 AbstractCegarLoop]: Abstraction has 2842 states and 3375 transitions. [2023-12-02 16:46:24,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:46:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3375 transitions. [2023-12-02 16:46:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 16:46:24,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:24,612 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 16:46:24,612 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:24,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -313376079, now seen corresponding path program 1 times [2023-12-02 16:46:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857852470] [2023-12-02 16:46:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:46:24,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857852470] [2023-12-02 16:46:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857852470] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844439872] [2023-12-02 16:46:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:24,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:24,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:24,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:24,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:46:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:25,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:46:25,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:46:25,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:25,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844439872] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:25,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:25,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 16:46:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922769414] [2023-12-02 16:46:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:46:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:46:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:46:25,091 INFO L87 Difference]: Start difference. First operand 2842 states and 3375 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:46:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:25,527 INFO L93 Difference]: Finished difference Result 4242 states and 5031 transitions. [2023-12-02 16:46:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:46:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 16:46:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:25,536 INFO L225 Difference]: With dead ends: 4242 [2023-12-02 16:46:25,536 INFO L226 Difference]: Without dead ends: 2623 [2023-12-02 16:46:25,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:46:25,541 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 156 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:25,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 813 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:46:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2023-12-02 16:46:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2335. [2023-12-02 16:46:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 1694 states have (on average 1.203659976387249) internal successors, (2039), 1709 states have internal predecessors, (2039), 360 states have call successors, (360), 287 states have call predecessors, (360), 279 states have return successors, (405), 340 states have call predecessors, (405), 357 states have call successors, (405) [2023-12-02 16:46:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 2804 transitions. [2023-12-02 16:46:25,832 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 2804 transitions. Word has length 102 [2023-12-02 16:46:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 2335 states and 2804 transitions. [2023-12-02 16:46:25,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:46:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 2804 transitions. [2023-12-02 16:46:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 16:46:25,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:25,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:25,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:46:26,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:26,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:26,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -842729145, now seen corresponding path program 1 times [2023-12-02 16:46:26,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:26,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155396201] [2023-12-02 16:46:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:46:26,062 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:46:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:46:26,139 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:46:26,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:46:26,140 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 16:46:26,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 16:46:26,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 16:46:26,146 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:26,150 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:46:26,214 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,218 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,229 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:46:26 BoogieIcfgContainer [2023-12-02 16:46:26,258 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:46:26,258 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:46:26,258 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:46:26,259 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:46:26,259 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:45:35" (3/4) ... [2023-12-02 16:46:26,260 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 16:46:26,289 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,290 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,297 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:46:26,379 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 16:46:26,379 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:46:26,379 INFO L158 Benchmark]: Toolchain (without parser) took 51956.25ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 139.2MB in the beginning and 1.1GB in the end (delta: -948.4MB). Peak memory consumption was 97.0MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,380 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 127.9MB. Free memory is still 98.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:46:26,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.67ms. Allocated memory is still 169.9MB. Free memory was 139.2MB in the beginning and 133.5MB in the end (delta: 5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,380 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.69ms. Allocated memory is still 169.9MB. Free memory was 133.5MB in the beginning and 131.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,381 INFO L158 Benchmark]: Boogie Preprocessor took 38.29ms. Allocated memory is still 169.9MB. Free memory was 131.4MB in the beginning and 129.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,381 INFO L158 Benchmark]: RCFGBuilder took 715.81ms. Allocated memory is still 169.9MB. Free memory was 129.0MB in the beginning and 74.8MB in the end (delta: 54.2MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,381 INFO L158 Benchmark]: TraceAbstraction took 50705.35ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 74.8MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,382 INFO L158 Benchmark]: Witness Printer took 120.56ms. Allocated memory is still 1.2GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 16:46:26,384 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 127.9MB. Free memory is still 98.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.67ms. Allocated memory is still 169.9MB. Free memory was 139.2MB in the beginning and 133.5MB in the end (delta: 5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.69ms. Allocated memory is still 169.9MB. Free memory was 133.5MB in the beginning and 131.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.29ms. Allocated memory is still 169.9MB. Free memory was 131.4MB in the beginning and 129.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 715.81ms. Allocated memory is still 169.9MB. Free memory was 129.0MB in the beginning and 74.8MB in the end (delta: 54.2MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * TraceAbstraction took 50705.35ms. Allocated memory was 169.9MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 74.8MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. * Witness Printer took 120.56ms. Allocated memory is still 1.2GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L33] int q_buf_0 ; [L34] int q_free ; [L35] int q_read_ev ; [L36] int q_write_ev ; [L37] int q_req_up ; [L38] int q_ev ; [L59] int p_num_write ; [L60] int p_last_write ; [L61] int p_dw_st ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L64] int c_num_read ; [L65] int c_last_read ; [L66] int c_dr_st ; [L67] int c_dr_pc ; [L68] int c_dr_i ; [L172] static int a_t ; [L500] int m_pc = 0; [L501] int t1_pc = 0; [L502] int m_st ; [L503] int t1_st ; [L504] int m_i ; [L505] int t1_i ; [L506] int M_E = 2; [L507] int T1_E = 2; [L508] int E_M = 2; [L509] int E_1 = 2; [L513] int token ; [L515] int local ; [L974] COND FALSE !(__VERIFIER_nondet_int()) [L977] CALL main2() [L961] int __retres1 ; [L965] CALL init_model2() [L876] m_i = 1 [L877] t1_i = 1 [L965] RET init_model2() [L966] CALL start_simulation2() [L902] int kernel_st ; [L903] int tmp ; [L904] int tmp___0 ; [L908] kernel_st = 0 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L909] FCALL update_channels2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L910] CALL init_threads2() [L658] COND TRUE m_i == 1 [L659] m_st = 0 [L663] COND TRUE t1_i == 1 [L664] t1_st = 0 [L910] RET init_threads2() [L911] CALL fire_delta_events2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L747] COND FALSE !(M_E == 0) [L752] COND FALSE !(T1_E == 0) [L757] COND FALSE !(E_M == 0) [L762] COND FALSE !(E_1 == 0) [L911] RET fire_delta_events2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L912] CALL activate_threads2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L612] COND FALSE !(m_pc == 1) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L622] __retres1 = 0 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L631] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L641] __retres1 = 0 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L912] RET activate_threads2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L913] CALL reset_delta_events2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, \old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L775] COND FALSE !(M_E == 1) [L780] COND FALSE !(T1_E == 1) [L785] COND FALSE !(E_M == 1) [L790] COND FALSE !(E_1 == 1) [L913] RET reset_delta_events2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L916] COND TRUE 1 [L919] kernel_st = 1 [L920] CALL eval2() [L694] int tmp ; VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L698] COND TRUE 1 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND FALSE, EXPR !(\read(tmp_ndt_1)) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, tmp=1, tmp_ndt_1=0, token=0] [L708-L719] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE, EXPR \read(tmp_ndt_2) [L727] EXPR t1_st = 1 [L728] CALL, EXPR transmit1() [L576] COND TRUE t1_pc == 0 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=0, t1_st=1, token=0] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET, EXPR transmit1() [L722-L733] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=0] [L698] COND TRUE 1 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=0] [L701] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=0] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=0] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE, EXPR \read(tmp_ndt_1) [L713] EXPR m_st = 1 [L714] CALL, EXPR master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] COND TRUE m_pc == 0 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L531] COND TRUE 1 [L534] token = __VERIFIER_nondet_int() [L535] local = token [L536] E_1 = 1 VAL [E_1=1, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L537] CALL immediate_notify() VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L829] CALL activate_threads2() VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L612] COND FALSE !(m_pc == 1) VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L622] __retres1 = 0 VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L631] COND TRUE t1_pc == 1 VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L632] COND TRUE E_1 == 1 [L633] __retres1 = 1 VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND TRUE \read(tmp___0) [L816] t1_st = 0 [L829] RET activate_threads2() VAL [E_1=1, E_M=2, M_E=2, T1_E=2, \old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, token=0] [L537] RET immediate_notify() VAL [E_1=1, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L538] E_1 = 2 [L539] m_pc = 1 [L540] m_st = 2 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L714] RET, EXPR master() [L708-L719] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=0, tmp=1, token=0] [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE, EXPR \read(tmp_ndt_2) [L727] EXPR t1_st = 1 [L728] CALL, EXPR transmit1() [L576] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=0] [L579] COND TRUE t1_pc == 1 [L595] token += 1 [L596] E_M = 1 VAL [E_1=2, E_M=1, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] CALL immediate_notify() VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L829] CALL activate_threads2() VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] int __retres1 ; VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L612] COND TRUE m_pc == 1 VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L613] COND TRUE E_M == 1 [L614] __retres1 = 1 VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND TRUE \read(tmp) [L808] m_st = 0 [L813] CALL, EXPR is_transmit1_triggered() [L628] int __retres1 ; VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L631] COND TRUE t1_pc == 1 VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L632] COND FALSE !(E_1 == 1) VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L641] __retres1 = 0 VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L829] RET activate_threads2() VAL [E_1=2, E_M=1, M_E=2, T1_E=2, \old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] RET immediate_notify() VAL [E_1=2, E_M=1, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L598] E_M = 2 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=1, token=1] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET, EXPR transmit1() [L722-L733] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=1] [L698] COND TRUE 1 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=1] [L701] CALL, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=1] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] RET, EXPR exists_runnable_thread2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=1] [L701] tmp = exists_runnable_thread2() [L703] COND TRUE \read(tmp) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp=1, token=1] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE \read(tmp_ndt_1) [L713] m_st = 1 [L714] CALL master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] COND FALSE !(m_pc == 0) VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L523] COND TRUE m_pc == 1 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L545] COND FALSE !(token != local + 1) [L550] COND TRUE tmp_var <= 5 [L551] COND TRUE tmp_var >= 5 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L556] COND TRUE tmp_var <= 5 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L557] COND TRUE tmp_var >= 5 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L558] COND TRUE tmp_var == 5 VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L559] CALL error2() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=1] [L496] reach_error() VAL [E_1=2, E_M=2, M_E=2, T1_E=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, local=0, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, t1_i=1, t1_pc=1, t1_st=2, token=1] - UnprovableResult [Line: 28]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 147 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 50.5s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4255 SdHoareTripleChecker+Valid, 7.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4183 mSDsluCounter, 9638 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5990 mSDsCounter, 1073 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6938 IncrementalHoareTripleChecker+Invalid, 8011 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1073 mSolverCounterUnsat, 3648 mSDtfsCounter, 6938 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1015 GetRequests, 796 SyntacticMatches, 5 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 21.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2842occurred in iteration=19, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 2475 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 2031 NumberOfCodeBlocks, 1995 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2024 ConstructedInterpolants, 0 QuantifiedInterpolants, 4115 SizeOfPredicates, 3 NumberOfNonLiveVariables, 2367 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 29 InterpolantComputations, 18 PerfectInterpolantSequences, 620/704 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 3.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 54, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 59, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME: 0.7s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 102, TOOLS_QUANTIFIERELIM_TIME: 2.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 162, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 54, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 888, DAG_COMPRESSION_RETAINED_NODES: 150, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 16:46:26,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91690d53-a6ee-4855-a2c0-989dbd5e6376/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE